Mechanical Characterization and FE Modelling of a Hyperelastic Material

Shahzad, Majid; Kamran, Ali; Siddiqui, Muhammad Zeeshan; Farhan, Muhammad

doi:10.1590/1516-1439.320414

Cited by 202 publications

(96 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…12,13 Here, the specimen dimensions were selected in such a way that the deformation along one direction was very large compared to the deformation of the direction perpendicular to that. Thereby, the small deformation could be considered zero compared to the larger deformation.…”

Section: Pure-shear Testmentioning

confidence: 99%

Elastomer testing: the risk of using only uniaxial data for fitting the Mooney-Rivlin hyperelastic-material model

Keerthiwansa¹,

Javořík²,

Kledrowetz³

et al. 2018

Mater. Tehnol.

View full text Add to dashboard Cite

The Mooney-Rivlin constitutive model is often used for the characterization of hyperelastic rubber-like materials. To obtain the material constants for a model, only a uniaxial-tension-data set is usually used. Though it is regularly used for its easiness of processing data in a simple and practical way, the method is considered to be insufficiently accurate. To analyse the shortcoming of the method, a detailed examination was done with the Mooney-Rivlin two-parameter model. This paper discusses the variations related to three basic load curves, i.e., uniaxial, equibiaxial and pure-shear curves. For a visual observation of the fitted-data dispersion, two data-fitting cases were considered. The first one was the data fitting only through uniaxial data while the second one was a combination of uniaxial and pure-shear experimental-data curve fitting. A detailed one-to-one comparison of the curves was done to achieve an accurate estimation of the variations. Keywords: uniaxial tension, equibiaxial loading, pure shear/planar shear loading, curve fitting, Mooney-Rivlin constitutive modelMooney-Rivlinov temeljni model se pogosto uporablja za karakterizacijo gumi podobnih hiperelasti~nih materialov. Za materialne konstante se obi~ajno uporablja set podatkov, dobljenih z enoosnim nateznim preizkusom.^eprav se ta na~in uporablja zaradi enostavnosti in prakti~nosti metode pa ga lahko smatramo kot manj natan~nega. Zato, da bi avtorji tega prispevka ugotovili neskladje, so izvedli natan~no analizo z Mooney-Rivlinovim dvoparametri~nim modelom. V~lanku avtorji obravnavajo variacije, ki se nana{ajo na tri osnovne krivulje obremenjevanja: enoosno, ekvivalentno dvoosno in~isti strig. Vizualno opazovanje raztrosa prilagojenih podatkov so izvedli na osnovi dveh na~inov prilagajanja podatkov. Prvo prilagajanje podatkov so izvedli na osnovi rezultatov enoosnega nateznega preizkusa. V drugem primeru so uporabili kombinacijo obeh: eksperimentalne rezultate enoosnega nateznega preizkusa in~istega striga. Izvedli so natan~no primerjavo krivulj in ocenili odstopanja. Klju~ne besede: enoosni nateg, ekvivalentna biaksialna obremenitev,~isti strig, ravninska stri`na obremenitev, prilagajanje krivulje, Mooney-Rivlinov konstitutivni (temeljni) model

show abstract

Section: Pure-shear Testmentioning

confidence: 99%

Elastomer testing: the risk of using only uniaxial data for fitting the Mooney-Rivlin hyperelastic-material model

Keerthiwansa¹,

Javořík²,

Kledrowetz³

et al. 2018

Mater. Tehnol.

View full text Add to dashboard Cite

show abstract

“…The tension of hydrogel surface for the experimental samples has been obtained from the strain energy function (Equation 3) considering the oocyte as a single layered cell [13], [14]. (3) where C 1 and C 2 are the material constants which control the shear behavior of the sample and can be achieved from uniaxial tests, and are the strain invariant which are related to the material.…”

Section: Model Presentationmentioning

confidence: 99%

“…It was employed for precise prediction of the sample behaviour when it is subjected to either a distributed force (exerted by a plate), or a concentrated force exerted by a needle. There are two different model types defined for hyperelastic materials such as phenomenological model and physically motivated model [14]. In this model, the strain-stress is characterized without considering the microscopic structure and analysis considerations using continuum model, which is referred to as the phenomenological model.…”

Section: Finite Element Modelling Of Artificial Oocytementioning

confidence: 99%

A Mechanical Model for an Artificial Oocyte

Hajiyavand¹,

Saadat²,

Stamboulis³

2017

IJMO

View full text Add to dashboard Cite

Abstract-Cell injection to introduce a foreign material in biological cells is currently an important area of research. Intervention with biological cells such as an oocyte poses a major limitation towards understanding their biomechanical behaviour, especially during injection, which could result in significant and undesirable deformation of the outer membrane. In this paper, a cross-linked alginate hydrogel is proposed as a material to develop an artificial oocyte to simulate the mechanical properties of a natural human oocyte and use it for mechanical analysis and modelling. A mechanical model and finite element analysis are first presented. The relationship between the injection force and the mechanical properties of the gel are then studied and presented. To validate the mechanical model, experiments were performed using different diameters of an oocyte made using the proposed hydrogel, showing that the modelling results satisfy the experimental demands and that this model can be used to estimate the mechanical properties of other gels too.Index Terms-Artificial oocyte, alginate, hydrogel, finite element model, deformation. I. INTRODUCTIONMany researchers have focused on micro-injection technology which has been proved to be an effective technique introducing foreign materials into cells. This technology can be applied for gene injection, In-vitro fertilisation (IVF), intra-cytoplasmic sperm injection (ICSI), drug development and other biomedical areas notably in cancer treatments [1]. To the best knowledge of the authors, this is the first report of proposing a material for fabricating an artificial oocyte.Accessing human biological oocyte samples for experimental work is very limited, and therefore having suitable artificial samples that could mimic the natural tissues would help to develop appropriate experimental methodology.Synthetic and natural polymers could be considered for the development of artificial tissues. In 2017 alginate hydrogels were proposed for transplantation of ovarian follicles considering different grafting times [2]. Alginate is one of the proposed materials which has the minimum grafting time that is reported to be one week [3]. Alginate

show abstract

“…Several criteria are found in previous researches to define the proper SEF of rubber material, i.e. the stress-strain curve of the material should perform the entire 'S' shape response, the change of deformation mode should be applicable under uniaxial tension, simple planar shear, and equibiaxial tension, the number of constitutive parameters should be small to minimize the need of experimental tests for their determination, and the mathematical equation should be simple to develop the possible numerical application of the model [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

FE Model of Low Grade Rubber for Modeling Housing’s Low-Cost Rubber Base Isolators

2018

View full text Add to dashboard Cite

An accurate selection of strain energy function (SEF) plays a very important role for predicting the actual behavior of rubber material in the finite element analysis (FEA). The common method for selecting the SEF is by using the curve fitting procedure. However, the behavior of some typical rubbers, such as low grade rubbers (average hardness value of 47.2), cannot be predicted well by only using the curve fitting procedure. To accurately predict the actual behavior of such specifically nearly incompressible material, a series of FEA were carried out to simulate the actual behavior of four physical testing materials, namely the uniaxial, the planar shear, the equibiaxial, and the volumetric tests. This FEA is intended to examine the most suitable constitutive model in representing the rubber characteristics and behavior. From the comparisons, it can be concluded that the Ogden model provides a reasonably accurate prediction compared to the remaining investigated constitutive material models. Finally, the appropriate SEF, i.e. the Ogden model, was adopted for modeling a low-cost rubber base isolator (LCRBI) in the finite element analysis (FEA). The simple uniaxial compression test of the LCRBI is required for validating that the selected SEF works for predicting the actual behavior of LCRBI.

show abstract

Mechanical Characterization and FE Modelling of a Hyperelastic Material

Cited by 202 publications

References 18 publications

Elastomer testing: the risk of using only uniaxial data for fitting the Mooney-Rivlin hyperelastic-material model

Elastomer testing: the risk of using only uniaxial data for fitting the Mooney-Rivlin hyperelastic-material model

A Mechanical Model for an Artificial Oocyte

FE Model of Low Grade Rubber for Modeling Housing’s Low-Cost Rubber Base Isolators

Contact Info

Product

Resources

About